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Thread: Can "yadif" filter be omitted?

  1. #1

    Question Can "yadif" filter be omitted?

    Hi,

    I have found that while transcoding the -filter:v "yadif" is applied to the transcoding options, is this mandatory? can this be omitted?

    Applying this filter increase dramatically the CPU usage during transcoding.

    Best Regards,

    Avi

  2. #2
    Join Date
    Sep 2009
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    2,260

    Default

    Hi Avi,
    the yadif filter is used to de-interlace video frames when transcoding, if a file is not interlaced then it should have no effect. The yadif filter is always added to the ffmpeg commandline and there is no setting to disable this currently, we will investigate to see if there is a reliable method to detect when this filter should be used and only apply it in these cases.

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  3. #3

    Default

    Hi Paul,

    A quick test that I made for transcoding of unsupported 1080P mp4 video to supported 1080P mpegts

    With yadif filter - 55 fps
    Without yadif filter - 140 fps

    That is a big difference

    Once again,
    Thanks for the support
    Avi

  4. #4
    Join Date
    Nov 2007
    Location
    Melbourne, Australia
    Posts
    11,647

    Default

    Thanks for letting us know, Avi. We'll look into our use of the yadif filter.

    Mezzmo Android: Install it on your tablet, smartphone, Android TV or Amazon Fire to browse and stream files from your Mezzmo library to all your devices. Full details at http://www.conceiva.com/products/mez...mo_android.asp
    Mezzmo for Kodi Add-on: Install it into Kodi to stream files from your Mezzmo library directly in Kodi. Full details at http://www.mezzmo.com/wiki/doku.php?...odi_user_guide
    Mezzmo for Roku App: Install it onto your Roku to stream files from your Mezzmo library. Full details at http://www.mezzmo.com/wiki/doku.php?...oku_user_guide
    Wiki: User Guides & Reference Manual at http://www.mezzmo.com/wiki
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  5. #5
    Join Date
    Jun 2010
    Posts
    136

    Default

    Quote Originally Posted by Peter View Post
    Hi Avi,
    the yadif filter is used to de-interlace video frames when transcoding, if a file is not interlaced then it should have no effect. The yadif filter is always added to the ffmpeg commandline and there is no setting to disable this currently, we will investigate to see if there is a reliable method to detect when this filter should be used and only apply it in these cases.
    This is actually not true. If you delace a 1080p stream it cuts the resolution in half. It basically becomes a 720p upscaled to 1080p. And if the source file has any 1080p details they will get striped out.

  6. #6
    Join Date
    Sep 2009
    Posts
    2,260

    Default

    Hi Dion,
    thanks for the information, we are working on detecting interlaced videos for Mezzmo 5.0 and only adding the yadif filter for those detected as interlaced.

    Mezzmo Android: Install it on your tablet, smartphone, Android TV or Amazon Fire to browse and stream files from your Mezzmo library to all your devices. Full details at http://www.conceiva.com/products/mez...mo_android.asp
    Mezzmo for Kodi Add-on: Install it into Kodi to stream files from your Mezzmo library directly in Kodi. Full details at http://www.mezzmo.com/wiki/doku.php?...odi_user_guide
    Mezzmo for Roku App: Install it onto your Roku to stream files from your Mezzmo library. Full details at http://www.mezzmo.com/wiki/doku.php?...oku_user_guide
    Wiki: User Guides & Reference Manual at http://www.mezzmo.com/wiki
    Facebook: http://www.facebook.com/Mezzmo.DLNA.Server
    Twitter: https://twitter.com/conceiva_mezzmo
    Web: http://www.mezzmo.com

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